Hi Michal-
> -----Original Message-----
> From: Michal Widera [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, March 06, 2001 2:22 AM
> To: Dunlap, Randy
> Subject: Re: [linux-usb-devel] Found Bug in Enumeration
>
>
> here is EXACT error message:
> from /var/log/messages
>
> Mar 2 10:02:12 localhost kernel: usb_control/bulk_msg: timeout
> Mar 2 10:02:12 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 263
> Mar 2 10:02:12 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 265
> Mar 2 10:02:12 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 267
> Mar 2 10:02:12 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 269
> Mar 2 10:02:12 localhost kernel: usb.c: unable to get descriptor
> Mar 2 10:02:12 localhost kernel: usb.c: unable to get device
> 4 configuration (error=-84)
-84 is reporting EILSEQ. This is either a TIMEOUT on an OUT transfer
or an CRC error on an IN transfer...and since GET_DEVICE_DESCRIPTOR
would be an IN transfer, it looks like the USB controller is reporting a
CRC error on the transfer.
So the USB code retries recognizing the device again, with the same
result.
> Mar 2 10:02:13 localhost kernel: hub.c: USB new device
> connect on bus1/2, assigned device number 5
> Mar 2 10:02:16 localhost kernel: usb_control/bulk_msg: timeout
> Mar 2 10:02:16 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 1495
> Mar 2 10:02:16 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 1497
> Mar 2 10:02:16 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 1499
> Mar 2 10:02:16 localhost kernel: usb-uhci.c: interrupt,
> status 2, frame# 1501
> Mar 2 10:02:16 localhost kernel: usb.c: unable to get descriptor
> Mar 2 10:02:16 localhost kernel: usb.c: unable to get device
> 5 configuration (error=-84)
> M
>
> we Haven't any good USB bus analyzer - can you tell what type
> is best on the market ?
> :-(
The only one that I know of that is widely used it CATC (www.catc.com).
They have USB 1.1 and USB 2.0 (includes 1.1) analyzers.
~Randy
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